You must have used the yellow mustard oil. But have you ever heard of black mustard oil? Black mustard oil is a highly nutritious oil. It is rich in monounsaturated fatty acids that are good for your heart, and reduce skin pigmentation. Also, it promotes hair growth and prevents premature graying of hair. The oil also contains Vitamin E, which reduces fine lines and wrinkles from your skin. Regular consumption of organic black mustard oil can also enhance blood circulation in your body.